Referencia de clase Objective-C:Error de símbolos no encontrados

Question

He estado trabajando en esta aplicación para iPhone por un tiempo y la tenía completamente terminada y funcionando.El proyecto que estaba ampliando se descargó de un repositorio de subversión en línea al que mi profesor también me había dado acceso.Accidentalmente no descargué la copia "raíz" o algo así, por lo que no pude realizar ningún cambio en el repositorio.Con la ayuda de mis instructores, descargué la copia raíz hoy y le agregué todos los archivos de mi clase para poder confirmar los cambios.Sin embargo, ahora recibo 3 errores extraños que nunca antes había visto:

Símbolos indefinidos:

"_Objc_class _ $ _ mapListViewController", referenciado desde:objc-class-ref-to-maplistViewController en mapViewController.o

"_Objc_class _ $ _ Mapparser", referenciado desde:objc-class-ref-to-mapParser en mapViewController.o

"_Objc_class _ $ _ maptabviewController", referenciado desde:objc-class-ref-to-maptabviewController en mapViewController.o

Ld:símbolo(s) no encontrado(s) recoger2:LD devolvió el código de salida 1

Ese es exactamente el mensaje de error que recibo.No he cambiado ningún código de la versión que estaba funcionando completamente esta mañana.¿Algún consejo?El archivo mapViewController parece ser el que está causando el problema, así que aquí está también:

#import "mapViewController.h"
#import "locationDetailViewController.h"
#import "DPUAnnotation.h"
#import "mapParser.h"
#import "mapListViewController.h"
#import "mapTabViewController.h"

@implementation mapViewController
@synthesize locationManager, mapView, mapAnnotations, mParser, mapListView, tabView;

@class DPUAnnotation;

+ (CGFloat)annotationPadding;
{
    return 10.0f;
}
+ (CGFloat)calloutHeight;
{
    return 40.0f;
}

- (void)gotoLocation
{
    // start off by default at DePauw campus
    MKCoordinateRegion newRegion;
    newRegion.center.latitude = 39.639348;
    newRegion.center.longitude = -86.861231;
    newRegion.span.latitudeDelta = 0.006776;
    newRegion.span.longitudeDelta = 0.006291;

    [self.mapView setRegion:newRegion animated:YES];
}

- (void)viewDidLoad {

    self.title = @"Map";
    mapView.mapType = MKMapTypeHybrid;
    mapView.showsUserLocation = YES;

    mapListView = [[mapListViewController alloc] initWithNibName:@"mapListView" bundle:nil];
    tabView = [[mapTabViewController alloc] initWithNibName:@"mapTabViewController" bundle:nil];

    if (mapAnnotations == nil)
    {
        self.mapAnnotations = [NSMutableArray array];
    } 
    else 
    {
        [mapAnnotations removeAllObjects];
    }

    UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"btn_home.png"] style:UIBarButtonItemStyleBordered target:self action:@selector(mainpageClicked)];
    [self.navigationItem setLeftBarButtonItem:backButton];

    UIBarButtonItem *mapListButton = [[UIBarButtonItem alloc] initWithTitle:@"Building List" style:UIBarButtonItemStylePlain target:self action:@selector(pushMapList)];
    [self.navigationItem setRightBarButtonItem: mapListButton];

    locationManager = [[CLLocationManager alloc] init];
    locationManager.delegate = self;
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    [locationManager startUpdatingLocation];

    [self gotoLocation];

    self.mParser = [[[mapParser alloc] init] autorelease];
    self.mParser.delegate = self;
    [self.mParser start];

    [super viewDidLoad];
}

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:(BOOL)animated];
}

- (void)dealloc 
{
    [mapView release];
    [locationManager release];
    [mapAnnotations release];

    [super dealloc];
}

/*
 * Returns the User to the main Application Page
 */
- (IBAction)mainpageClicked
{
    NSLog(@"Return To Main page Clicked");
    [self.parentViewController dismissModalViewControllerAnimated:YES];
    [self.navigationController release];
}

- (IBAction) pushMapList
{   
    tabView = [[mapTabViewController alloc] initWithNibName:@"mapTabViewController" bundle:nil];
    tabView.mapAnnotations2 = mapAnnotations;
    [self.navigationController pushViewController:tabView animated:YES];
    [tabView release];
}

- (IBAction)addAnnotation
{   
    [self.mapView removeAnnotations:self.mapView.annotations];

    for (int i = 0; i < [mapAnnotations count]; i++)
        [mapView addAnnotation:[mapAnnotations objectAtIndex:i]];
    NSLog(@"BLAH BLAH BLAH PLEASE PRINT");
    if([mapAnnotations count] == 0)
        NSLog(@"array is empty");
}

- (void)showDetails:(id)sender
{
    NSInteger selectedIndex = [sender tag];
    DPUAnnotation *selectedObject = [mapAnnotations objectAtIndex:selectedIndex];

    [self.navigationController setToolbarHidden:YES animated:NO];

    NSURL *url = [NSURL URLWithString: selectedObject.url];

    locationDetailViewController *locationDetailView;
    locationDetailView = [[locationDetailViewController alloc] initWithNibName:@"mapDetailView" bundle:nil];
    [self.navigationController pushViewController:locationDetailView animated:YES];
    [locationDetailView.webView loadRequest: [NSURLRequest requestWithURL:url]];
    [locationDetailView release];

    [selectedObject release];
}

- (MKAnnotationView *)mapView:(MKMapView *)theMapView viewForAnnotation:(id <MKAnnotation>)annotation
{   
    // if it's the user location, just return nil.
    if ([annotation isKindOfClass:[MKUserLocation class]])
        return nil;

    if([[annotation subtitle] isEqualToString:@"Academic"])
    {
        // try to dequeue an existing pin view first
        static NSString* annotationIdentifier = @"annotationIdentifier";
        MKPinAnnotationView* pinView = (MKPinAnnotationView *)[theMapView dequeueReusableAnnotationViewWithIdentifier:annotationIdentifier];

        if (!pinView)
        {
            MKAnnotationView *annotationView = [[[MKAnnotationView alloc] initWithAnnotation:annotation
                                                                             reuseIdentifier:annotationIdentifier] autorelease];
            annotationView.canShowCallout = YES;

            UIImage *academicImage = [UIImage imageNamed:@"academic.png"];

            CGRect resizeRect;

            resizeRect.size = academicImage.size;
            CGSize maxSize = CGRectInset(self.view.bounds,
                                         [mapViewController annotationPadding],
                                         [mapViewController annotationPadding]).size;
            maxSize.height -= self.navigationController.navigationBar.frame.size.height + [mapViewController calloutHeight];
            if (resizeRect.size.width > maxSize.width)
                resizeRect.size = CGSizeMake(maxSize.width, resizeRect.size.height / resizeRect.size.width * maxSize.width);
            if (resizeRect.size.height > maxSize.height)
                resizeRect.size = CGSizeMake(resizeRect.size.width / resizeRect.size.height * maxSize.height, maxSize.height);

            resizeRect.origin = (CGPoint){0.0f, 0.0f};
            UIGraphicsBeginImageContext(resizeRect.size);
            [academicImage drawInRect:resizeRect];
            UIImage *resizedImage = UIGraphicsGetImageFromCurrentImageContext();
            UIGraphicsEndImageContext();

            annotationView.image = resizedImage;
            annotationView.opaque = NO;

            UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
            NSInteger annotationValue = [self.mapAnnotations indexOfObject:annotation];
            rightButton.tag = annotationValue;
            [rightButton addTarget:self action:@selector(showDetails:) forControlEvents:UIControlEventTouchUpInside];
            annotationView.rightCalloutAccessoryView = rightButton;

            return annotationView;
        }
        else
        {
            pinView.annotation = annotation;
        }
        return pinView;
    }

    else if([[annotation subtitle] isEqualToString:@"Administrative"])
    {
        // try to dequeue an existing pin view first
        static NSString* annotationIdentifier = @"annotationIdentifier";
        MKPinAnnotationView* pinView = (MKPinAnnotationView *)[theMapView dequeueReusableAnnotationViewWithIdentifier:annotationIdentifier];

        if (!pinView)
        {
            MKAnnotationView *annotationView = [[[MKAnnotationView alloc] initWithAnnotation:annotation
                                                                             reuseIdentifier:annotationIdentifier] autorelease];
            annotationView.canShowCallout = YES;

            UIImage *administrativeImage = [UIImage imageNamed:@"administrative.png"];

            CGRect resizeRect;

            resizeRect.size = administrativeImage.size;
            CGSize maxSize = CGRectInset(self.view.bounds,
                                         [mapViewController annotationPadding],
                                         [mapViewController annotationPadding]).size;
            maxSize.height -= self.navigationController.navigationBar.frame.size.height + [mapViewController calloutHeight];
            if (resizeRect.size.width > maxSize.width)
                resizeRect.size = CGSizeMake(maxSize.width, resizeRect.size.height / resizeRect.size.width * maxSize.width);
            if (resizeRect.size.height > maxSize.height)
                resizeRect.size = CGSizeMake(resizeRect.size.width / resizeRect.size.height * maxSize.height, maxSize.height);

            resizeRect.origin = (CGPoint){0.0f, 0.0f};
            UIGraphicsBeginImageContext(resizeRect.size);
            [administrativeImage drawInRect:resizeRect];
            UIImage *resizedImage = UIGraphicsGetImageFromCurrentImageContext();
            UIGraphicsEndImageContext();

            annotationView.image = resizedImage;
            annotationView.opaque = NO;

            UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
            NSInteger annotationValue = [self.mapAnnotations indexOfObject:annotation];
            rightButton.tag = annotationValue;
            [rightButton addTarget:self action:@selector(showDetails:) forControlEvents:UIControlEventTouchUpInside];
            annotationView.rightCalloutAccessoryView = rightButton;

            return annotationView;
        }
        else
        {
            pinView.annotation = annotation;
        }
        return pinView;
    }

    else if([[annotation subtitle] isEqualToString:@"University Housing"] || [[annotation subtitle] isEqualToString:@"Residence Halls"] || [[annotation subtitle] isEqualToString:@"University Duplexes"] || [[annotation subtitle] isEqualToString:@"Greek Housing"])
    {
        // try to dequeue an existing pin view first
        static NSString* annotationIdentifier = @"annotationIdentifier";
        MKPinAnnotationView* pinView = (MKPinAnnotationView *)[theMapView dequeueReusableAnnotationViewWithIdentifier:annotationIdentifier];

        if (!pinView)
        {
            MKAnnotationView *annotationView = [[[MKAnnotationView alloc] initWithAnnotation:annotation
                                                                             reuseIdentifier:annotationIdentifier] autorelease];
            annotationView.canShowCallout = YES;

            UIImage *housingImage = [UIImage imageNamed:@"housing.png"];

            CGRect resizeRect;

            resizeRect.size = housingImage.size;
            CGSize maxSize = CGRectInset(self.view.bounds,
                                         [mapViewController annotationPadding],
                                         [mapViewController annotationPadding]).size;
            maxSize.height -= self.navigationController.navigationBar.frame.size.height + [mapViewController calloutHeight];
            if (resizeRect.size.width > maxSize.width)
                resizeRect.size = CGSizeMake(maxSize.width, resizeRect.size.height / resizeRect.size.width * maxSize.width);
            if (resizeRect.size.height > maxSize.height)
                resizeRect.size = CGSizeMake(resizeRect.size.width / resizeRect.size.height * maxSize.height, maxSize.height);

            resizeRect.origin = (CGPoint){0.0f, 0.0f};
            UIGraphicsBeginImageContext(resizeRect.size);
            [housingImage drawInRect:resizeRect];
            UIImage *resizedImage = UIGraphicsGetImageFromCurrentImageContext();
            UIGraphicsEndImageContext();

            annotationView.image = resizedImage;
            annotationView.opaque = NO;

            UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
            NSInteger annotationValue = [self.mapAnnotations indexOfObject:annotation];
            rightButton.tag = annotationValue;
            [rightButton addTarget:self action:@selector(showDetails:) forControlEvents:UIControlEventTouchUpInside];
            annotationView.rightCalloutAccessoryView = rightButton;

            return annotationView;
        }
        else
        {
            pinView.annotation = annotation;
        }
        return pinView;
    }

    else if([[annotation subtitle] isEqualToString:@"Other"])
    {
        // try to dequeue an existing pin view first
        static NSString* annotationIdentifier = @"annotationIdentifier";
        MKPinAnnotationView* pinView = (MKPinAnnotationView *)[theMapView dequeueReusableAnnotationViewWithIdentifier:annotationIdentifier];

        if (!pinView)
        {
            MKAnnotationView *annotationView = [[[MKAnnotationView alloc] initWithAnnotation:annotation
                                                                             reuseIdentifier:annotationIdentifier] autorelease];
            annotationView.canShowCallout = YES;

            UIImage *otherImage = [UIImage imageNamed:@"other.png"];

            CGRect resizeRect;

            resizeRect.size = otherImage.size;
            CGSize maxSize = CGRectInset(self.view.bounds,
                                         [mapViewController annotationPadding],
                                         [mapViewController annotationPadding]).size;
            maxSize.height -= self.navigationController.navigationBar.frame.size.height + [mapViewController calloutHeight];
            if (resizeRect.size.width > maxSize.width)
                resizeRect.size = CGSizeMake(maxSize.width, resizeRect.size.height / resizeRect.size.width * maxSize.width);
            if (resizeRect.size.height > maxSize.height)
                resizeRect.size = CGSizeMake(resizeRect.size.width / resizeRect.size.height * maxSize.height, maxSize.height);

            resizeRect.origin = (CGPoint){0.0f, 0.0f};
            UIGraphicsBeginImageContext(resizeRect.size);
            [otherImage drawInRect:resizeRect];
            UIImage *resizedImage = UIGraphicsGetImageFromCurrentImageContext();
            UIGraphicsEndImageContext();

            annotationView.image = resizedImage;
            annotationView.opaque = NO;

            UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
            NSInteger annotationValue = [self.mapAnnotations indexOfObject:annotation];
            rightButton.tag = annotationValue;
            [rightButton addTarget:self action:@selector(showDetails:) forControlEvents:UIControlEventTouchUpInside];
            annotationView.rightCalloutAccessoryView = rightButton;

            return annotationView;
        }
        else
        {
            pinView.annotation = annotation;
        }
        return pinView;
    }

    else if([[annotation subtitle] isEqualToString:@"Fields"])
    {
        // try to dequeue an existing pin view first
        static NSString* annotationIdentifier = @"annotationIdentifier";
        MKPinAnnotationView* pinView = (MKPinAnnotationView *)[theMapView dequeueReusableAnnotationViewWithIdentifier:annotationIdentifier];

        if (!pinView)
        {
            MKAnnotationView *annotationView = [[[MKAnnotationView alloc] initWithAnnotation:annotation
                                                                             reuseIdentifier:annotationIdentifier] autorelease];
            annotationView.canShowCallout = YES;

            UIImage *athleticsImage = [UIImage imageNamed:@"athletics.png"];

            CGRect resizeRect;

            resizeRect.size = athleticsImage.size;
            CGSize maxSize = CGRectInset(self.view.bounds,
                                         [mapViewController annotationPadding],
                                         [mapViewController annotationPadding]).size;
            maxSize.height -= self.navigationController.navigationBar.frame.size.height + [mapViewController calloutHeight];
            if (resizeRect.size.width > maxSize.width)
                resizeRect.size = CGSizeMake(maxSize.width, resizeRect.size.height / resizeRect.size.width * maxSize.width);
            if (resizeRect.size.height > maxSize.height)
                resizeRect.size = CGSizeMake(resizeRect.size.width / resizeRect.size.height * maxSize.height, maxSize.height);

            resizeRect.origin = (CGPoint){0.0f, 0.0f};
            UIGraphicsBeginImageContext(resizeRect.size);
            [athleticsImage drawInRect:resizeRect];
            UIImage *resizedImage = UIGraphicsGetImageFromCurrentImageContext();
            UIGraphicsEndImageContext();

            annotationView.image = resizedImage;
            annotationView.opaque = NO;

            UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
            NSInteger annotationValue = [self.mapAnnotations indexOfObject:annotation];
            rightButton.tag = annotationValue;
            [rightButton addTarget:self action:@selector(showDetails:) forControlEvents:UIControlEventTouchUpInside];
            annotationView.rightCalloutAccessoryView = rightButton;

            return annotationView;
        }
        else
        {
            pinView.annotation = annotation;
        }
        return pinView;
    }

    else if([[annotation subtitle] isEqualToString:@"Landmarks"])
    {
        // try to dequeue an existing pin view first
        static NSString* annotationIdentifier = @"annotationIdentifier";
        MKPinAnnotationView* pinView = (MKPinAnnotationView *)[theMapView dequeueReusableAnnotationViewWithIdentifier:annotationIdentifier];

        if (!pinView)
        {
            MKAnnotationView *annotationView = [[[MKAnnotationView alloc] initWithAnnotation:annotation
                                                                             reuseIdentifier:annotationIdentifier] autorelease];
            annotationView.canShowCallout = YES;

            UIImage *landmarkImage = [UIImage imageNamed:@"landmark.png"];

            CGRect resizeRect;

            resizeRect.size = landmarkImage.size;
            CGSize maxSize = CGRectInset(self.view.bounds,
                                         [mapViewController annotationPadding],
                                         [mapViewController annotationPadding]).size;
            maxSize.height -= self.navigationController.navigationBar.frame.size.height + [mapViewController calloutHeight];
            if (resizeRect.size.width > maxSize.width)
                resizeRect.size = CGSizeMake(maxSize.width, resizeRect.size.height / resizeRect.size.width * maxSize.width);
            if (resizeRect.size.height > maxSize.height)
                resizeRect.size = CGSizeMake(resizeRect.size.width / resizeRect.size.height * maxSize.height, maxSize.height);

            resizeRect.origin = (CGPoint){0.0f, 0.0f};
            UIGraphicsBeginImageContext(resizeRect.size);
            [landmarkImage drawInRect:resizeRect];
            UIImage *resizedImage = UIGraphicsGetImageFromCurrentImageContext();
            UIGraphicsEndImageContext();

            annotationView.image = resizedImage;
            annotationView.opaque = NO;

            UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
            NSInteger annotationValue = [self.mapAnnotations indexOfObject:annotation];
            rightButton.tag = annotationValue;
            [rightButton addTarget:self action:@selector(showDetails:) forControlEvents:UIControlEventTouchUpInside];
            annotationView.rightCalloutAccessoryView = rightButton;

            return annotationView;
        }
        else
        {
            pinView.annotation = annotation;
        }
        return pinView;
    }

    return nil;
}

#pragma mark <mapParser> Implementation

- (void)parser:(NSXMLParser *)parser didFailWithError:(NSError *)parseError {

}

- (void)parserDidEndParsingData:(mapParser *)parser
{
    [self addAnnotation];

    tabView.mapAnnotations2 = mapAnnotations;

    self.mParser = nil;
    [mParser release];
}

- (void)parser:(mapParser *)parser didParseItem:(NSArray *)parsedItem
{
    NSLog(@"Did Parse Map Item");

    [self.mapAnnotations addObjectsFromArray:parsedItem];
}

- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFailWithError:(NSError *)error {}
- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFindPlacemark:(MKPlacemark *)placemark {}

@end

Answer 1

Lo más probable es que estas tres clases falten en el archivo de su proyecto.Verifique el grupo Clases en su proyecto XCode para ver si estos tres archivos están presentes.De lo contrario, haga clic derecho en el grupo Clases y haga clic en Agregar > Archivos existentes para agregarlos.

Si los archivos se agregan al proyecto, asegúrese de que los archivos de implementación (.m) para estas clases faltantes se agreguen a las fuentes compiladas.Para comprobarlo, expanda el grupo. Targets > your application target > Compile Sources, y vea si los archivos están presentes.Si no, haga clic derecho en "Compilar fuentes" y vaya a Add > Existing Files para agregarlos.Una forma alternativa y quizás más rápida de hacer lo mismo es seleccionar los archivos .m para cada una de las clases que faltan y ver si la casilla de verificación en el extremo derecho está marcada.De lo contrario, verifíquelo y se agregará automáticamente a las fuentes compiladas.

Answer 2

"_ objc_class _ $ _ maplistViewController", referenciado desde: Objc-Class-Ref-to-MapListViewController en MAPVIEWCONROLLER.O

"_ objc_class _ $ _ mapparser", referenciado desde: Objc-Class-Ref-to-Mapparser en MAPVIEWCONROLLER.O

"_ objc_class _ $ _ maptabviewcontroller", referenciado desde: Objc-Class-Ref-to-MaptabviewController en MAPVIEWCONROLLER.O

ld: Símbolo (s) no encontrado COLECCIÓN2: LD devuelto 1 estado de salida

Asegúrese de que todos (MaplistViewController, Mapparser, MaptabViewController) tengan ambos @Interface & @Implementation

Esto resuelve mi problema.Me pase a la señorita Mira la implementación. Faltaba

Answer 3

Estaba teniendo el mismo problema que resolví agregando el marco a Xcode

Answer 4

Cuando agrega CoreGraphics Biblaray. Necesitas seleccionar PROYECT_NAME-> Objetivos / Seleccionar Nombre del proyecto (no seleccionar el nombre de la prueba de proyecto, es un error que enfrenta) -> BuildSetting-> y agregar CORELOUSUGATE.FRAMEWARK

Answer 5

I was having this problem when I was trying to have pod 'FirebaseRemoteConfig inside app extensions. I added $(inherited) instead of -ObjC to Other Linker Flags in the Build Settings of the Extension target.

I hope it helps anyone out there. I have lost 1 hour finding this solution.